Tertius Robertus wrote:robertus omnibus salutem dicit (what is the greek for this?)
ῬοβέÏτος πᾶσι χαίÏειν. Greek uses infinitives in the opening salutations of letters.
1 Are the three verb forms a safeguide to all other forms? or shall i truly have to master those rules, those long rules full of exceptions?
For what you have learned, mostly. There are exceptions aplenty which you must simply memorize. Also, and I ask you not to take fright from this, the Greek verb has not three but six principal parts. You haven't covered yet the remaining three.
2 of the verb á¼Î½Î´Î¬Î½Ï‰ the form ἔαδον (page 61 of the pdf) is for the imperfect given, however in lesson 10 (page 58 of the pdf) the form ἥνδανε,

which one is the true?
The third principal part is the
aorist, not the imperfect. So ἥνδανε is the imperfect and ἕαδον is the aorist.
3 why is ου behaving as a diphtong in the declensions, ie, forbidin' the ^ to appear as in νοÏσους, if it sounds as a vowel.
Both ου and ει started out their lives as diphthongs (er, not always true for ει, but pretend it is for now), then became long vowels.
4 as the dative masculine of ἑκεῖνος á¼ÎºÎµá¿–νῳ is given, whereas it should be á¼ÎºÎµÎ¯Î½á¿³ by the rules, is this a ortographical mistake or it falls into the exceptions
That is, as you correctly noticed, an error. It's correct in the edition I have (Wright's 1985 revision).
5 the prepostions ἀνά á¼Ï‚ á¼Î½ have, like others, alternate forms ἀν εἰς á¼Î½Î¯, but unlike others, it is not told how they are to occur -.- when then?
Homer gets to use whichever form he feels like (for metrical reasons, or inspirational ones). In your own translation exercises stick with εἰς, á¼Î½ and ἀνά.

6 how do i travel through the pdf without having to scroll for minutes (ya, there are the booknmarks, but they dont link to all the sections in the book, how can i do my own bookmarks)
I can't help you with this. It'll be different depending on the make/model of the PDF viewer you use.
vale! (what is the greek for this?)
á¼”ÏÏωσθε to several people, á¼”ÏÏωσο to one.